While

were at it and since we have to "see" signs in order to be able to "see" them? 

Lets look up the definition of "see". 

I betcha it has more  connotations than you think it does. 

There is the word of the day BTW, "connotations", 

just in case anybody was interested.

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Definition of see

saw \ˈsȯ\; seen \ˈsēn\; seeing \ˈsē-iŋ\

transitive verb

to perceive by the eye:to perceive or detect as if by sight

2 a :to have experience of : undergo 

see army service

b :to come to know :discover

c :to be the setting or time of

the last fifty years have seen a sweeping revolution in science

—Barry Commoner

3a :to form a mental picture of :visualize 

can still see her as she was years ago

b :to perceive the meaning or importance of :understand

c :to be aware of :recognize 

sees only our faults

d :to imagine as a possibility :suppose 

couldn't see him as a crook

4a :examine, watch 

want to see how she handles the problem1

c :to attend as a spectator 

see a play

5a :to take care of :provide for 

had enough money to see us through

b :to make sure 

see that order is kept

6a :to regard as :judge

b :to prefer to have 

I'll see him hanged first 

I'll see you dead before I accept your terms

c :to find acceptable or attractive 

can't understand what he sees in her

7a :to call on :visit1

8:accompany, escort 

see the guests to the door

9:to meet (a bet) in poker or to equal the bet of (a player) :call

intransitive verb

:to give or pay attention:to look about

:to have the power of sight:to apprehend objects by sight:to perceive objects as if by sight

:to grasp something mentally

b :to acknowledge or consider something being pointed out 

see, I told you it would rain

:to make investigation or inquiry

— 

seeable \ˈsē-ə-bəl\ adjective

— see after

:to attend to :care for

— see eye to eye

:to have a common viewpoint :agree

— see red

:to become very angry

— see the light

:to discover or realize a usually obscured truth

— see the light of day

:to become publicly known or available (as through publication) 

manuscripts that will never see the light of day

— see things

:hallucinate

— see through

:to grasp the true nature of 

saw through the scheme

— see to

:to attend to :care for

My personal favorite?

to be the setting or time of

Go figure right?